Model Based System Engineering (MBSE) as a discipline is increasingly integrating complex analysis as early into the development cycle as possible. This analysis is aimed at supporting Modular Open System Approach (MOSA), where characteristics of MBSE models such as Power, Latency or Resource Utilization are captured and analyzed. Such models once constructed are then used through the lifecycle of the system to understand and manage system evolution. This presentation looks at building such a system model using a “Domain of Discourse”, a built to purpose metamodel and Object Constraint Language (OCL) rules to manage the integration and organization of concepts in a model. It highlights an integration of OCL and open source Architecture Analysis and Design Language (AADL) tools that Carnegie Mellon Software Engineering Institute (SEI) publishes to do cyber-physical analysis. The presentation will also briefly cover examples of how these same techniques integrate some physics based mission simulation tools.